Year	Measure
1990	7681
1991	5454
1992	3825
1993	2709
1994	2578
1995	2696
1996	2875
1997	3062
1998	2796
1999	2172
2000	2319
2001	2966
2002	3073
2003	2944
2004	2960
2005	3095
2006	3190
2007	3352
2008	3526
2009	3624
2010	3762
2011	3963
2012	4042